Sand bailer and perforator cleaner



Jan. 19, 1943,

A. B. scoTT SAND BAILER PERFOR ATOR CLEANER FiledSept. 9,1940 v v v m 3.w a M G E90 4 l1. 2 5

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Patented Jan. 19, 1943 UNHTEDYISTATES TENT OFFICE This invention relatesto well cleaning devices, and more especially to pump, sand bailersdesigned for use in connection with oil or other deep wells, and theinvention has for its object to provide a bailer constructed in a mannerto allow the ready passage therethrough of any fluid which may bestanding in the bottom of the well as the bailer is lowered to removesand or other material which may have accumulated in the hole.

Other objects and advantages will appear and be brought out more fullyfrom the following specification, reference being had to theaccompanying drawing, wherein Fig. l is an elevation in central sectionof a bailer embodying my invention;

Fig. 2 is a sectional view taken along the line 2-2 of Fig. 1; and

Fig. 3 is a fragmentary view illustrating the rope socket.

Referring more particularly to the drawing, I show a well casing orliner 5 having a plurality of apertures 6 in which is a bailer bucket I,having an interior cylindrical wall 8, a plurality of apertures 9adjacent to the upper portion thereof and a head In suitably securedthereto as by screw threads or otherwise, head l0 having a central boreH adapted to receive a piston rod I2. Piston rod [2 is suitably securedto a connecting socket 13 by means of threads l3 and the lock nut I l.The socket l3 has an extension M, to which is secured the rope l5, asillustrated in Fig. 3. A collar I6 is secured to piston rod l2 withincylinder 8 and is adapted to engage the lower side of head l0 duringupward operation and lock nut I1 is secured to the lower end of pistonrod l2 and supports a valve cage l8 which is mounted on the rod I2 andhas a conical upper surface. A piston valve l9 having an internal lowerconical surface adapted to engage with the upper conical surface of cageI8 is carried by cage I8 and is provided with an external piston ringrecess 20 in which is a piston ring 2| and a plurality of passages 22connecting between recess 20 and the interior conical surface of valvel9. Valve l9 has a plurality of radial grooves 23 in the upper portionthereof adapted to communicate with an axial bore 24 in the valve whichmerges with the conical surface of valve I9.

The operation of the invention should be clear from the foregoingdescription.

During the vertical upward reciprocation of piston rod 12, collar l6 andvalve 19 will be carried to the dotted positions indicated in Fig. 1.The downward movement of valve cage l8 from the dotted line positionshown in the drawing will force the material to be raised past theconical surfaces of cage 18 and valve I9 and upwardly through bore 24and passages 23 and raised by valve l9 and piston ring 2| upwardly pastcollar l6, which is provided with side wall clearance and upwardlythrough apertures 9 and 6 through the well casing.

From the foregoing, it will be clear that the device of my invention isadapted to pump sand, mud and shale without sticking and that productionfor oil, water or other wells will be greatly increased.

It will also be clear that by the operation of my invention, theperforations of the liner will be kept open by the pulsation action ofthe device, and also permits the oil or water to enter the well.

It will also be clear that a vacuum can be produced by high speedoperation or it can be operated without vacuum at low speed.

It will also be clear that by the use of a bailer as constructedaccording to my invention, the bailer will not stick nor become lost inthe well. Having described my invention, what I claim 1. A bailer of thecharacter described, comprising a bailer bucket having a closed upperendand openings in the walls thereof, a piston rod loosely passing throughthe closed upper end, a

collar carried by the piston rod for limiting the upward movement of thepiston rod in the bailer bucket, a valve cage carried by the lower endof the piston rod and having a conical outer surface, a valve having aconical inner surface loosely mounted on the conical surface of thevalve cage, an annular recess in the outer periphery of the valve, apiston ring in said recess and of a width and thickness less than thewidth and depth of the recess, and passages in the valve leading fromthe recess to the conical surface of the valve.

2. A bailer of the character described, comprising a bailer buckethaving a closed upper end and openings in the upper ends of the wallsthereof, a piston rod loosely passing through the closed upper end, anannular collar carried by the lower end portion of the piston rod andspaced from the walls of the bailer bucket for limiting the uppermovement of the piston rod, a valve cage carried by the lower end of thepiston rod and having a conical outer surface, a valve having a conicalsurface loosely mounted on the conical surface of the valve cage and itsupper end spaced from the piston rod, an annular recess in the outerperiphery of the valve, a piston ring in said recess and of a width andthickness less than the width and depth of the recess, and passagesleading from the inner wall of the recess to the conical surface of thevalve.

3. The combination with a bailer bucket of a piston rod, a valve cagecarried by the lower end of the piston rod and having a conical outerface, a valve having a conical inner face loosely mounted on the conicalface of the valve cage, an annular recess in the outer face of the valveand passages in the valve leading from the inner face of the recess tothe conical face of the valve,

and a piston ring in said recess and of a width and thickness less thanthe width and depth of the recess.

4. The combination with a bailer bucket of a piston rod, a valve cagecarried by the lower end of the piston rod and having a conical outerface, a valve surrounding the piston rod and spaced therefrom andprovided with a conical inner face loosely mounted on the conical faceof the valve cage, an annular recess in the outer face of the valve andpassages in the valve leading from the inner face of the recess to theconical face of the valve, and a piston ring in said recess and tightlyengaging the bore of the cylinder and of a width and thickness less thanthe width and depth of the recess.

AUGUSTUS B. SCO'I'I.

